What was found
DURING TAKEOFF ROLL, PRIOR TO 70KTS, MASTER CAUTION ILLUMINATED WITH ANTISKID INOPERATIVE CAUTION LIGHT. TAKEOFF WAS ABORTED. LIGHTS STAYED ON APROX 3 SECOND, WENT OUT, AND ILLUMINATED AGAIN DURING ROLLOUT FOR ANOTHER 3-4 SECONDS. R & R RT WHEEL SPEED TRANSDUCER WITH O/H UNIT IAW AMM 32-42-07. OPS CHECKED GOOD.